NOTE
To select aid mode an alarm action must be selected in the menu 5.1.4.
Caution
Selecting "aid mode” is not the same as correcting the problem that
caused the alarm. The status lamp will therefore continue to be red.
If the alarm does not reset, contact your installer for suitable remedial ac-
tion.
NOTE
Always give the product's serial number (14 digits) when reporting a
fault.
Troubleshooting
If the operational interference is not shown in the display the following
tips can be used:
Basic actions
Start by checking the following possible fault sources:
■
The switch's position.
■
Group and main fuses of the accommodation.
■
The property's earth circuit breaker.
■
Correctly set load monitor (if installed).
Low hot water temperature or a lack of hot water
■
Closed or choked filling valve for the hot water heater.
■
Open the valve.
■
Mixing valve (if there is one installed) set too low.
■
Adjust the mixer valve.
■
Heat pump in incorrect operating mode.
■
Enter menu 4.2. If mode "auto" is selected, select a higher value on
"stop additional heat" in menu 4.9.2.
■
If mode "manual" is selected, select "addition".
■
Large hot water consumption.
■
Wait until the hot water has heated up. Temporarily increased hot
water capacity (temporary lux) can be activated in menu 2.1.
■
Too low hot water setting.
■
Enter menu 2.2 and select a higher comfort mode.
■
Too low or no operating prioritisation of hot water.
71NIBE™ F750Chapter 4 | Disturbances in comfort
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